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A 120-loop solenoid has a radius of 1.0 cm and is constructed using 12-gauge wire, which...

A 120-loop solenoid has a radius of 1.0 cm and is constructed using 12-gauge wire, which has a diameter of 2.05 mm. Current If flows through the wire. (a) If the magnetic eld inside the solenoid is 31 µT, determine the current in the solenoid. (b) The solenoid is unwound and the wire is formed into a single loop carrying the same current. What is the magnetic eld at the center of the loop?

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